Sleepy Hollow is a Democratic stronghold. About 77% of voters here vote Democratic and 23% Republican.
About 79% of adults in Sleepy Hollow typically vote, above the U.S. average of about 62%. Among adults in Sleepy Hollow, ~61% vote Democratic, ~18% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How Sleepy Hollow compares
Among cities within 25 miles, Sleepy Hollow leans more Democratic than 48 of 67 neighbors.
Sleepy Hollow runs about 34 points more Democratic than California as a whole.
Politics vary noticeably by neighborhood within Sleepy Hollow. The west side is the most Democratic-leaning (D+70) and the southeast side is the least Democratic-leaning (D+47), a spread of about 22 points.
Why Sleepy Hollow leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Sleepy Hollow, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 73% of adults in Sleepy Hollow hold a bachelor's degree, about 45 points above the U.S. average of 28%. Dense areas vote Democratic, and Sleepy Hollow sits in the top fifth on density (about 38%, above 83% of cities).
Population density and Democratic lean
Places with high population density tend to lean Democratic; Sleepy Hollow, CA sits in the top quarter nationally on this measure.
Why turnout in Sleepy Hollow looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Sleepy Hollow is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 78%, about 18 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Sleepy Hollow have completed high school, above 94% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Fairfax, CA D+73
- San Anselmo, CA D+60
- Woodacre, CA D+52
- Ross, CA D+52
- San Rafael, CA D+46
- San Geronimo, CA D+51
- Kentfield, CA D+54
- Greenbrae, CA D+51
- Lagunitas-Forest Knolls, CA D+60
- Forest Knolls, CA D+60
Cities with Similar Populations
- Rosholt, WI R+27
- Walden Woods, TX R+48
- Cavalier, ND R+47
- Walnut Grove, CA R+7
- Shullsburg, WI R+33
- Caseville, MI R+33
- Wheeler, TX R+64
- Ivor, VA R+33
- Port Austin, MI R+31
- Buena, NJ R+18
Sources and methodology
Precinct-level voting records used to fit the model come from California Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.